The Steven F. Udvar-Hazy Center displays thousands of aviation and space artifacts, including the Space Shuttle Discovery, a Blackbird SR-71, and a Concorde, in two large hangars. It is close to the hotel and free admission!
You can visit a battlefield from the Civil War - not far from the hotel!
If you want to travel into DC (by Metro or Uber) there are many different things you can do! The Smithsonian museums are free, the National Mall is a beautiful walk which is bordered by the Washington Monument and Lincoln Memorial and there are lots of restaurants to enjoy!